What sounds does a cat make when angry?

The sound a cat makes when angry is generally low-pitched. If the cat is only a little annoyed, it usually makes a low-frequency or unstable-frequency purr; if it is very angry and about to attack, it will directly hiss at the other party.

Besides vocal signs, an angry cat will puff up its fur, arch its back, and show ‘airplane ears.’ If you notice the cat’s ears pulling back to the sides, soothe it promptly and stop doing things that upset it, to avoid being accidentally scratched or bitten.